diff --git a/app/main.py b/app/main.py
index b2d096bda..e91586770 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,8 +1,44 @@
 class Car:
-    # write your code here
-    pass
+    def __init__(self, comfort_class: int,
+                 clean_mark: int,
+                 brand: str) -> None:
+        self.comfort_class = comfort_class
+        self.clean_mark = clean_mark
+        self.brand = brand
 
 
 class CarWashStation:
-    # write your code here
-    pass
+    def __init__(self,
+                 distance_from_city_center: float,
+                 clean_power: int,
+                 average_rating: float,
+                 count_of_ratings: int) -> None:
+        self.distance_from_city_center = distance_from_city_center
+        self.clean_power = clean_power
+        self.average_rating = average_rating
+        self.count_of_ratings = count_of_ratings
+
+    def calculate_washing_price(self, car: Car) -> float:
+        return round(
+            (car.comfort_class * (self.clean_power - car.clean_mark)
+             * self.average_rating / self.distance_from_city_center), 1)
+
+    def wash_single_car(self, car: Car) -> float:
+        if car.clean_mark < self.clean_power:
+            price = self.calculate_washing_price(car)
+            car.clean_mark = self.clean_power
+            return price
+        return 0
+
+    def serve_cars(self, cars: list) -> int:
+        income = 0
+        if cars:
+            for car in cars:
+                income += self.wash_single_car(car)
+        return income
+
+    def rate_service(self, rate: int) -> None:
+        self.average_rating = round(
+            (self.average_rating * self.count_of_ratings + rate)
+            / (self.count_of_ratings + 1), 1)
+        self.count_of_ratings += 1